Carbureter.



R. A. DUPP CARBURBTER.

APPLICATION Mmm 001.6, 190e.

Patented Dec. 8, 1914.

QVdnuna UNITED sTATEs PnTENT oFFToE.

RALPH A. DUFF, OF NEBRASKA CITY, NEBRASKA.

CARBURETEE.

specification or Letter; Patent;

Patented Dec'. 8, 1914.

Application filed October 6, 1809. Serial 'No 521,401.

` tures of air and hydrocarbon gas for use in explosion engines.

It is the object of the present invention to provide a carburetor which will automatically control the gas mixture in' accordance with the demand of the engine,.aummati` callyincreasing the supply of gas andthe supply .fof air for producing' the explosive mixture, as the demand for the fuel increases.v

In accordance with the present invention the hydro-carbon, which latter may be of any type suited for the purpose, although for convenience of description the hydrofcarbon will be considered as gasolene, is fed to the device through a. suitable Yfloat chamber which in itself forms no*A part of the'present invention. The gasolene flows to a valve from which it is fed in quantities determined by the position of the valve, to one or more nozzles from `which the asolene may issue in fine streams. The nozz es or-jet tips are located in a conduit through which air is directed in a manner to traverse `the streams of gasolen'eso as to cause a thorough intermingling of the air with the volatilized gasolene, after -wl1ich the mixture flows through a. valve into which air may be adf mitted in quantities depending upon the demand? so that the mixture already produced is diluted to an extent by freshv streams of air entering the fuel streanrjibjeyond 'the point of initial volatilization and intermingling.

The invention will be best understood from a consideration of the following-detail description taken in connection Withfthe accompanying drawings'forming apart'of this specification of whi'chdrawings, y

Figure l is an elevation: of the' improved carburetor including the float chamber. Fig. 2" is a section on the line A-B of Fi f3. Fig. 3 is a section on'the lineCD- of iig. 2. Fig. 4 is a section illustrating a: modi -cation of the structure shown in Figs.

and 3. p

Referring to the drawings. there is Shown a am chamber 1 which may be Ofany 'suie' f able construction, but' as the construction-of .this float chamber" does not' enter.A intothepresent invention, Vthe;'exterior only is shown'v v'and further" description.' v notA necessary... A, Y

This float ehai'nbjer is' designed'irto-niaintai a certa-in level of the gasolene supply, gas-f olenebeing talerfi as typical'of 'any carburet-v ig fluid. Incoinmun-ica'tion withthefloat chamber is a casing 2`whi'chV is usually, in operation, upright as indicated' ih' the drawing, but this does not p're'vrit'it use '1n-any other suitable position.' Forv convenience of description the casing 2 will be, considered as having its longitu inal axisvertical, and

reference in the followirrgiidescription t'o the 4position of parts will boiwith 'the underf standing that the. longitudinal; d lxis ofthe casing is vertical, but i'nayfvvitlidt.affectinge the'ivention be horizontal di; atahy.suitable angle.,

The upper lend: ofthe casing, 1s y.

formed with -afrigii .fofcolip'ling itt` d" f pipe or conduit leading tofthe'inle't portee j ports of the engine to Whiclithe carbureteg.

is toi-supply fue Such' engine is n ot shown in the drawing since i`t` forms no -parrt of'thej i present invention, and the-'connections o f is well` understood. A The lower end of the Y carbureters to tle inlet ports' of'such engir'ies casing 2 is normally closed by a screw ,aiif

4 and above this cap the casing is foi-,rn d

with a. circular series of air inlet porti;y the effective area of which may be controll by screwing the cap 4 to a greater or less etent onto the. orespolndng end of casing. A s'h'orifl distance above the l'owefr.V

zontal tubular portionin f tn'e- 'particuiar' showing of Figs. Qiand'g and'*this tubular.

portion` opens' at one endfin'nto'aboss'l 7 `from which thereQ-leads a conduitfg to the float bhamber l. "I

Hous'ed Withinv 'thembijrememerf is a cylindrical holloi'gfv valve -9liaving` one end open and in communication with' the conduit 8 while the other end'i's closed and is tfudinal axis for a purpose which will hereinafter appear. Through the walls of the hollow valve are formed ports 12 of'-difl'er ent lengths in a direction about the axis ot rotation of the valve and these ports may be brought into communication with corresponding passages 13 through a thickened .portion 14- of the tubular member on the side of the latter remote from the air inlet end of the casing 2.' -In each passage 13 there is a nipple 15 having a passagev longitudinally through it, which passage may be of small dimensions` so that but a fine stream of material will flow therethrough. These nipplesl in thestru'cture shown in '.Figs 2 and'B are directed toward the upper of thev casing along a'diameter thereof. )n each side of the tubular member C the ier walls of thecasingare thiclhrened from y 1e lower en d upward so as to curve inward toward the outer wallsof the tubular member into closer approach thereto than would be thecase were the sidefwalls of the casing the same distan-ce from* the centralI aXis thereof throughout. These inwardly curved walls are indicated at 16 and the center of curvature is nearer to the center line of the casing than are the walls thereof, thus causing the .air entering the casing to flow up around the outer walls of the tubularinembei' 6 into close relation to the open en'ls of the nipples 15, which latter constitute jet nozzles for the gasolene,so that the incom- --ing'ct'irr'ents of air tend to traverse the jets 1. ofgasolene thus 'quickly volatilizing them v and thoroughly Yinteriningling` with the gas so produced.

` At an appropriate distance above the nozzles there is mounted in theconduit 2 so to traverse the same, a hollow cylindrical e .'17 having a stem 18 extending to the xterior ot the casing and to this stem there ,ib a link 20 to the arin 11 of the valve 9. Ye two valves 9 and 17 willtherefore move ether and may be controlled from a movpart of the engine connected to the arm ofthe lever 19, remote from that connected 7 tothe link 20, so as to respond to varying conditions, such as variations in load. The valve' 1.7 is formed with diametrically opposite ports 21V of suflicient size to give `free passage of the mixture to the outlet end of the casing 2 connected to the engine, in different positions of the valve aboilt'its axis of rotation. Between the ports f1 the .vals ot the valve are pierced by other ports at diametrically opposite points and these valves may be wider at'one end than the other and in the rotative movement ot' the valve 17 these ports lwill.,.in one position match other ports 33 leading through opposite sides of the casing to the external atinosphere.

The structure shown in Fig. fl differs from i the explosive mixture.

secured a bell Crank lever l.) connected` that shown in Figs. 2 and 3 in that the valve now one of the ports 12, say the longest' port in the ldirection of rotation of the valve 9, be opposite an appropriate one of the nozzle to the interior of the casing 2, especially under the suction produced by the operation of the engine being supplied with engine also sets up an'infiow of aiir through the port 5 and this ,air finds its "way up through the casing 2 being directed across the nozzles 15 in a manner to tend to traverse the stream or streams of gasolene issuing from the nozzles. If it be assumed that the conditions present are such as to demand but `a1no dcrate quantity of the explosive mixture, and one rather lean in hydro-carbongas, then the valve 9 is so positioned that but lone ofthe nozzles 15 will receive gasolene while the others are cut off. If now the demand be for a greater quantitv of the mixture; then-the valve 9`is turned until the second one of the ports l2.is brought'in'to coincidence with the second one of the nozzles and a greater supply of gasolene follows to meet The suction of thenozzles 15 gasolene will flow through such the increasing inrush of Aair 1through theY ports 5. 1V hen the greatest demand occurs then" the third port 12 is opened to the cor-` responding nozzle 15 and the fini supply of gasolene issues. During thisrtimethe valve 17 has been turning on its axis to bring the port toward coincidence with the ports 23. the time the second nozzle 12l is in operation then the narrower lends fof the ports are opened to the ports 23 and a certain amount of air is indrawn:r through the ports When the, third nozzleis'in action the ports 22 may be in tlieiiifiillest communication with the ports 23. It will be noted that one of the por-ts 12 is sufficiently long to remain in' communication .vith its nozzle while the other two ports are coming into service while the second port is sulficiently extensive to remain in service until' engine speed'and -coupled up to the bell crank lever 19.

What is claimed ist 1. A carbureter, comprising a easing, a valve, a valve easing having jet nozzles within the casing, and the valve being '.e-:l to open the nozzles in order, an'air in the easing, and the valve being adapted to open the nozzles in order, an air inlet for the sing at one end thereof, an independent mixing valve for the casing between the outlet of '.he easing and the inlet nozzle for the vfuel, .ind adjustable means for connecting tlmq valves for simultaneous action.

2*.. .i earlmreter, comprising a casing having a lower air admitting port, an elongated valve and inclosing member therefor transof the easing, :i series of jet producing outlets carried b v the inelosing member for delivering streams of fuel into the casing, said valve having a plurality ofgvaryingr sized ports for registering with the t for the casing at one end thereof, an

ports of the inelosing member, wherebyA fuel is delivered sueizessively tol the outlets, said easing heilig provided with air admitting ports above the fuel outlets, a valve for controlling the air admitting ports, and means eoi'inerting the fuel controlling and air controlling valves for movement in unison, whereby the air valve is operated to increase `the admission above the fueloutlets as the fuel supply is increased and vice versa.

l. carbureter comprising a suitable casing, a rotatable valve traversing the same, a valve casing having jet nozzles thereon \vithin-the casing, the valve being adapted to open the nozzles in order, an air inlet for the casing at one end thereof, an independent, mixing valve for thev easing bef tvveen the outlet of' the casing and the inlet nozzles for the hydro-carbon huid, and adjustable connections between the valves for causing their simultaneous action.

ln testimony that l claim the foregoing as my own, l have hereto aflixedmy signa ture in tne presence of two witnesses.

RALPH A. DUFF.

lVitnesses H. D. WILSON, CHAS. G. BENNETT. 

